[AceBMW]

i really want to pull the trigger. i know the pricing is relatively similar for modmy3.com & jgmods, but my only concern is the fitment. i'm hoping anyone that has bought the e90 mtech rear bumper from either vendor can let me know if there were any issues. are the guides that are mentioned really necessary (i've just got oem non-mtech bumper right now) or will it be okay? thanks in advance